bug: Injected with indentation Rust code breaks Markdown formatting

[aitvann]

Neovim version (nvim -v)

NVIM v0.10.2

Operating system/version

NixOS unstable-d70bd19e0a38ad4790d3913bf08fcbfc9eeca507

Read debugging tips

• I have read through the debugging tips.

Add the debug logs

• I have set log_level = vim.log.levels.DEBUG and pasted the log contents below.

Log file

2024-12-25 01:49:03[DEBUG] Running formatters on /home/aitvann/playground/conform/example.md: { "injected" }
2024-12-25 01:49:03[INFO] Run injected on /home/aitvann/playground/conform/example.md
2024-12-25 01:49:03[DEBUG] Injected format rust:10:11: { "rustfmt" }
2024-12-25 01:49:04[INFO] Run rustfmt on /home/aitvann/playground/conform/example.md.1.rs
2024-12-25 01:49:04[DEBUG] Run command: { "/nix/store/qpma970g7a0a36qdqrp6aqagynkriygd-rust-default-1.83.0/bin/rustfmt", "--emit=stdout", "--edition=2021" }
2024-12-25 01:49:04[DEBUG] Run default CWD: /home/aitvann/playground/conform
2024-12-25 01:49:04[DEBUG] Injected format rust:8:9: { "rustfmt" }
2024-12-25 01:49:04[INFO] Run rustfmt on /home/aitvann/playground/conform/example.md.3.rs
2024-12-25 01:49:04[DEBUG] Run command: { "/nix/store/qpma970g7a0a36qdqrp6aqagynkriygd-rust-default-1.83.0/bin/rustfmt", "--emit=stdout", "--edition=2021" }
2024-12-25 01:49:04[DEBUG] Run default CWD: /home/aitvann/playground/conform
2024-12-25 01:49:04[DEBUG] Injected format rust:5:7: { "rustfmt" }
2024-12-25 01:49:04[INFO] Run rustfmt on /home/aitvann/playground/conform/example.md.5.rs
2024-12-25 01:49:04[DEBUG] Run command: { "/nix/store/qpma970g7a0a36qdqrp6aqagynkriygd-rust-default-1.83.0/bin/rustfmt", "--emit=stdout", "--edition=2021" }
2024-12-25 01:49:04[DEBUG] Run default CWD: /home/aitvann/playground/conform
2024-12-25 01:49:04[INFO] rustfmt exited with code 1
2024-12-25 01:49:04[DEBUG] rustfmt stdout: { "" }
2024-12-25 01:49:04[DEBUG] rustfmt stderr: { "error: unexpected closing delimiter: `}`", " --> <stdin>:1:1", "  |", "1 | }", "  | ^ unexpected closing delimiter", "", "" }
2024-12-25 01:49:04[ERROR] Formatter 'rustfmt' error: error: unexpected closing delimiter: `}`
 --> <stdin>:1:1
  |
1 | }
  | ^ unexpected closing delimiter


2024-12-25 01:49:04[INFO] rustfmt exited with code 1
2024-12-25 01:49:04[DEBUG] rustfmt stdout: { "" }
2024-12-25 01:49:04[DEBUG] rustfmt stderr: { "error: expected item, found keyword `let`", " --> <stdin>:1:1", "  |", "1 | let a = a;", "  | ^^^ consider using `const` or `static` instead of `let` for global variables", "", "" }
2024-12-25 01:49:04[ERROR] Formatter 'rustfmt' error: error: expected item, found keyword `let`
 --> <stdin>:1:1
  |
1 | let a = a;
  | ^^^ consider using `const` or `static` instead of `let` for global variables


2024-12-25 01:49:04[DEBUG] rustfmt exited with code 0
2024-12-25 01:49:04[ERROR] error formatting log line: '{
  code = 6,
  message = "Formatter 'rustfmt' error: error: unexpected closing delimiter: `}`\n --> <stdin>:1:1\n  |\n1 | }\n  | ^ unexpected closing delimiter\n\n"
}' args {
  n = 0
}

Describe the bug

formatting works as expected when code block does not have indentation.:

1.  first line

``` rust
// hi


fn foo(a: u8) {
    let a = a;
    let b = a       ;
}
\```

but if I indent the code block to be the part of a list like this:

1.  first line

    ``` rust
    // hi
    

    fn foo(a: u8) {
        let a = a;
        let b = a       ;
    }
   \ ```

it breaks half way through (notice a blank line disappeared but ; stayed at the same place:

1.  first line

    ``` rust
    // hi
    
    fn foo(a: u8) {
        let a = a;
        let b = a       ;
    }
    \```

What is the severity of this bug?

breaking (some functionality is broken)

Steps To Reproduce

example Markdown file:

1.  first line

    ``` rust
    // hi
    

    fn foo(a: u8) {
        let a = a;
        let b = a       ;
    }
   \ ```

Expected Behavior

the expected Markdown file:

1.  first line

    ``` rust
    // hi

    fn foo(a: u8) {
        let a = a;
        let b = a;
    }
    \```

Minimal example file

1.  first line

    ``` rust
    // hi
    

    fn foo(a: u8) {
        let a = a;
        let b = a       ;
    }
   \ ```

Minimal init.lua

-- DO NOT change the paths and don't remove the colorscheme
local root = vim.fn.fnamemodify("./.repro", ":p")

-- set stdpaths to use .repro
for _, name in ipairs({ "config", "data", "state", "cache" }) do
  vim.env[("XDG_%s_HOME"):format(name:upper())] = root .. "/" .. name
end

-- bootstrap lazy
local lazypath = root .. "/plugins/lazy.nvim"
if not vim.loop.fs_stat(lazypath) then
  vim.fn.system({
    "git",
    "clone",
    "--filter=blob:none",
    "--single-branch",
    "https://github.com/folke/lazy.nvim.git",
    lazypath,
  })
end
vim.opt.runtimepath:prepend(lazypath)

-- install plugins
local plugins = {
  "folke/tokyonight.nvim",
  {
    "stevearc/conform.nvim",
    config = function()
      require("conform").setup({
        log_level = vim.log.levels.DEBUG,
        -- add your config here
      })
    end,
  },
  -- add any other plugins here
}
require("lazy").setup(plugins, {
  root = root .. "/plugins",
})

vim.cmd.colorscheme("tokyonight")
-- add anything else here

require('conform').setup({
    formatters_by_ft = {
        sql = { "injected", lsp_format = "last" },
        rust = { "injected", lsp_format = "last" },
        markdown = { "injected", lsp_format = "last" },
    },
    formatters = {
        injected = {
            options = {
                ignore_errors = false,
                lang_to_formatters = {
                    sql = { "sqlfluff" },
                    rust = { "rustfmt" },
                },
            },

        }
    }
})

Additional context

No response